Lizardite+magnetite This new rock belong to the Kaolinite-Serpentine group. A large family with 20 minerals and over 30 commercial names. This is a Magnesium Silicate ( Mg3Si2O5(OH)4 ) with hydrotalcite and magnetite. Hardness is 2.5-3 but is quite tough and takes a good polish . Named after the Lizard Complex locality ,Cornwall. Comes form Snarum, Vikersund, Norway. Hand polished on both side. Size:30.1x16.9x7 mm. Weight:26.30 ct. CODE#1015